Posted 05/15/08 For 25 years, Elizabeth Betty Muir, has provided gentle care and thoughtful instruction for the children of many Wesleyan employees and Middletown community members. On May 29, Muir will retire from her role at Wesleyans Neighborhood Preschool and will be celebrated at a potluck party at 5 p.m. at 115 High Street in Middletown. Betty is better than Mary Poppins, says parent Stephan Angle, associate professor and chair of philosophy, associate professor of East Asian studies. Angles daughters, Samantha, now 12, and Rachel, now 9, both spent ages 3 and 4 at the preschool under Bettys care. She…